Holocene lake level variations of Longmu Co, western Qinghai-Tibetan Plateau

ISL OpenIR > 青海盐湖研究所知识仓储

	Holocene lake level variations of Longmu Co, western Qinghai-Tibetan Plateau
	Liu, Xiang-Jun1 ; Madsen, David B.2; Liu, Ruiyuan 1; Sun, Yongjuan1 ; Wang, Yixuan1
	2016-02-01
发表期刊	ENVIRONMENTAL EARTH SCIENCES
卷号	75 期号:4
关键词	Western Qinghai-tibetan Plateau Paleoshorelines Lake Level Variations Luminescence Dating Radiocarbon Dating
摘要	Longmu Co is surrounded by conspicuous regressive shorelines attesting to high-water levels in the past. In this study, we dated paleoshoreline sediments around the lake using optically stimulated luminescence (OSL), infrared stimulated luminescence (IRSL) and radiocarbon dating, then explored the forces that drove Holocene lake level variations. We found that: (1) OSL/ IRSL ages are consistent with geomorphic sequences and some extant cosmogenic and U/Th shoreline ages. However, inorganic evaporite crust 14 C ages are much older than corresponding OSL/IRSL ages due to varying lake reservoir effects and should be used with caution; (2) The highest lake levels of Longmu Co (similar to 160-145 m above present) lasted from similar to 12.8 to similar to 11.3 ka. Two periods of abrupt lake level declines occurred at similar to 11.3 and similar to 7.4 ka (lake level dropped similar to 44 and similar to 45 m, respectively), with a gradual regression of similar to 18 m between these two intervals. The lake expanded moderately from similar to 7 to 5.5 ka, then declined once more after similar to 5.5 ka, with this regression accelerating during the last similar to 1.5 ka; (3) The deglacial lake level transgression was likely due to glacier melt waters. The Indian Summer Monsoon reached the Longmu Co watershed and brought precipitation during the early Holocene. Middle to late Holocene lake regression was caused by the retreat of the monsoon and consequent environmental deterioration.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6301
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所盐湖地质与环境实验室
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 2.Lanzhou Univ, Res Sch Arid Environm & Climate Change, MOE Key Lab West Chinas Environm Syst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiang-Jun,Madsen, David B.,Liu, Ruiyuan,et al. Holocene lake level variations of Longmu Co, western Qinghai-Tibetan Plateau[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(4).
APA	Liu, Xiang-Jun,Madsen, David B.,Liu, Ruiyuan,Sun, Yongjuan,&Wang, Yixuan.(2016).Holocene lake level variations of Longmu Co, western Qinghai-Tibetan Plateau.ENVIRONMENTAL EARTH SCIENCES,75(4).
MLA	Liu, Xiang-Jun,et al."Holocene lake level variations of Longmu Co, western Qinghai-Tibetan Plateau".ENVIRONMENTAL EARTH SCIENCES 75.4(2016).